Which of the following nitrogen fertilizer sources has the least %N?
A. Urea
B. Anhydrous ammonia
C. Ammonium sulfate
D. Ammonium nitrate
Ans: C. Ammonium sulfate
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At the beginning of the tricarboxylic acid (TCA) cycle, oxaloacetate is converted into which of the following molecules?
A. pyruvate B. citrate C. ATP D. carbon dioxide
A primary way that HIV infection contributes to global hunger is by
A. causing the disability or death of young adults who are the primary wage earners in a family. B. causing the disability or death of infants and young children who are the family's future wage earners. C. disqualifying families affected by AIDS from local food distribution programs. D. forcing older adults to return to the workforce.
The energy-requiring mechanism whereby molecules move into or out of cells by way of an enclosed vesicle, known as _______________ transport, takes two major forms: _______________ (in which substances are released into the cytoplasm) and _______________ (in which substances are released into the extracellular fluid)
Fill in the blank(s) with correct word
Dietary supplements, especially multi-vitamins and minerals, can turn a bad diet into a good diet
Indicate whether the statement is true or false